chickens arent pooping as much please help

So every morning i used to go out and see a whole poopvoared full of chicken poop. The past couple of days i noticed there has been very minimal poop. So little i thought to myself "wow my mom has been on top of cleaning the coop!"

When i asked her she said she doesnt even remember the last time she cleaned it. So now im worried they have an impacted crop. Ive tried to feel for it but im new to chickes and just dont know what in feeling for. They arent acting any different so im hoping ive caught it early. Is there something i should be doing to help them? And special diet change i should make? Please help